Dashboard errors, battery seems fine, no error codes

Hi all,

I've had the dreaded plethora of dashboard warnings/errors, i.e. ABS, Stability Control, HDC, Parking Brake come up on the Evoque (MY2012).

Knowing the battery is usually the source of issues; the battery is 3 years old (with 5 year guarantee) and appears ok; charged 100% with 12.8v displayed. I've also tested the auxillary battery and this is saying 12.74v.

Unforunately connecting my OBD2 reader shows no error codes stored.

I'm at a loss as to what to check and how to check it - any ideas?!

Thanks.

Typo said MY2021, meant MY2012!